Metavolcanic rocks and orthogneisses from Porongos and Várzea do Capivarita complexes: A case for identification of tectonic interleaving at different crustal levels from structural and geochemical data in southernmost Brazil

Reconstruction of a volcano-sedimentary environment shared by the Porongos and Várzea do Capivarita complexes at 790 Ma, Dom Feliciano Belt, southern Brazil

“…Thin-skin tectonics and relatively low geothermal gradient, as discussed by Battisti et al (2018) and De Toni et al ( 2021) are additional evidence for such interpretation.…”

“…1). It is interpreted as a W-verging nappe body thrust onto the Central Domain (Martil et al, 2017;Battisti et al, 2018;De Toni et al, 2021). These well-preserved roof pendants (Martil et al, 2017 -Fig.…”

Tectono‐Metamorphic Evolution of the Northern Dom Feliciano Belt Foreland, Santa Catarina, Brazil: Implications for Models of Subduction‐Driven Orogenesis

“…810–770 Ma within a series of pre‐orogenic rift basins (Percival, Konopásek, Eiesland, et al., 2021; Pertille et al., 2017; Saalmann et al., 2011). Early deformation and peak metamorphism in the Schist Belt is thought to be the result of crustal thickening during convergence (Battisti et al., 2018), typical of fold‐and‐thrust belts in convergent orogen. Although there are currently no reliable age constraints for the timing of this event, some authors have used the metamorphism in the hinterland at ca.…”

“…These units consist of volcanosedimentary sequences deposited between ca. 570–540 Ma (Guadagnin et al., 2010; Oliveira et al., 2014), parts of which are metamorphosed and tectonically interleaved with metasedimentary rocks of the Schist Belt (Battisti et al., 2018; Höfig et al., 2018; Percival, Konopásek, Eiesland, et al., 2021).…”

“…However, in the northern SANOS, some researchers have recently moved away from standard subduction‐collision models entirely, arguing that an absence of sufficient space between continental blocks precludes the formation of a large oceanic domain and long‐lived subduction between the South American and African cratonic blocks (Cavalcante et al., 2018, 2019; Fossen et al., 2017, 2020; Konopásek et al., 2017, 2020; Meira et al., 2019). The existence of a large‐scale Adamastor Ocean has been similarly challenged in the Dom Feliciano Belt of the southern SANOS, where evidence of the post‐collisional nature of the Granite Belt (e.g., Bitencourt & Nardi, 2000; Florisbal, Janasi, Bitencourt, & Heaman, 2012; Oyhantçabal et al., 2007), and of collisional metamorphism pre‐dating intrusion of the Granite Belt (Battisti et al., 2018; Koester et al., 2016; Oyhantçabal et al., 2009), casts doubt on its origins within a supra‐subduction zone magmatic arc. Owing to this, some authors have proposed that the Kaoko–Dom Feliciano–Gariep orogenic system formed from the inversion of a back‐arc to intracontinental rift basin where subduction occurred much earlier and further to the west (De Toni, Bitencourt, Nardi, et al., 2020; Konopásek et al., 2018, 2020; Oriolo, Oyhantçabal, Basei, et al., 2016; Oriolo, Oyhantçabal, Wemmer, Basei, et al., 2016).…”